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Invalid Parameter

Understand the SumUp API Invalid Parameter response, common causes, and example payload for requests with an invalid field value.

Indicates that the server cannot or will not process the request due to something that is perceived to be a client error (e.g., malformed request syntax, invalid request message framing, or deceptive request routing).

Common Causes

Section titled “Common Causes”
  • A required field is missing or empty.
  • A field has the wrong type or format (for example, a string where a number is expected).
  • A value is outside the allowed range or list of supported values.
{
  "message": "Validation error",
  "error_code": "INVALID",
  "param": "card.expiry_year"
}